package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.annotation.AutoFill;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeEditPasswordDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.enumeration.OperationType;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        //
        // 进行md5加密后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
//        克隆属性
        BeanUtils.copyProperties(employeeDTO,employee);
//        设置密码
        employee
                .setPassword(DigestUtils
                        .md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD
                                .getBytes()));
//        设置用户状态
        employee.setStatus(StatusConstant.ENABLE);
////        设置创建时间
//        employee.setCreateTime(LocalDateTime.now());
////        设置更新时间
//        employee.setUpdateTime(LocalDateTime.now());
////      设置当前记录创建人id和修改人id,使用ThreadLocal的方法
//        employee.setCreateUser(BaseContext.getCurrentId());
//        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.insert(employee);

    }

    /**
     * 员工分页查询
     * @param pageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO pageQueryDTO) {
        PageHelper.startPage(pageQueryDTO.getPage(),pageQueryDTO.getPageSize());
        Page<Employee> page = employeeMapper.pageQuery(pageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }


    /**
     * 修改员工账号的锁定状态
     * @param status
     * @param id
     */
    @Override
    public void startAndStopUser(Integer status, Long id) {
        Employee employee = Employee.builder()
                .status(status)
                .id(id).build();
        employeeMapper.update(employee);
    }

    /**
     * 根据id查询用户信息
     * @param id
     * @return
     */
    @Override
    public Employee queryEmployeeById(Long id) {
        Employee employee = employeeMapper.queryEmployeeById(id);
        employee.setPassword("****");
        return employee;
    }

    /**
     * 更新员工信息
     * @param employeeDTO
     */
    @Override
    public void updateEmployee(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee); // 属性拷贝
//        employee.setUpdateTime(LocalDateTime.now());
//        // 从ThreadLocal中获取当前用户的id
//        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.update(employee);
    }

    /**
     * 修改密码
     * @param editPasswordDTO
     */
    @Override
    public void editPassword(EmployeeEditPasswordDTO editPasswordDTO) {
        Employee employee = Employee.builder()
                .password(DigestUtils.md5DigestAsHex(editPasswordDTO.getNewPassword().getBytes()))
                .id(BaseContext.getCurrentId())
                .build();
        Employee searchedEmp = employeeMapper.queryEmployeeById(employee.getId());
        if (DigestUtils.md5DigestAsHex(editPasswordDTO
                .getOldPassword()
                .getBytes())
                .equals(searchedEmp.getPassword()) ) {
            employeeMapper.update(employee);
        }else {
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }
    }
}
